<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<link rel="stylesheet" href="css/bootstrap.css">
		<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
	</head>
	<body>
		<div class="container">
			<div class="row">
				<!-- 列嵌套主要用于复杂布局 -->
				<div class="col-md-3 borde bg-warning">左侧</div>
				<div class="col-md-9 borde bg-warning">
					<h3>右侧嵌套一个row</h3>
					<div class="row text-center">
						<div class="col-md-6 border bg-primary py-5">第一行第一列</div>
						<div class="col-md-6 border bg-primary py-5">第一行第二列</div>
					</div>
					<div class="row text-center">
						<div class="col-md-4 border bg-primary py-5">第二行第一列</div>
						<div class="col-md-8 border bg-primary py-5">第二行第二列</div>
					</div>
				</div>
			</div>
		</div>
	</body>
</html>
